Flashing Durability

Where a flashing is hidden or is otherwise difficult to access for maintenance or replacement, or it requires cladding to be removed to replace the flashing, it must have durability for the life of the building or not less than 50 years. All flashings should be made from materials with a durability expectation not less than that of the cladding.

In some corrosive environments, stainless steel or non-ferrous metals should be used for flashings. All metals must be checked for compatibility with the roof material. (See Compatibility and Interactive Material Compatibility Tool)